143-24-8Relevant articles and documents
METHOD FOR THE PRODUCTION OF POLYOXYMETHYLENE DIALKYL ETHERS FROM TRIOXAN AND DIALKYLETHERS
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Page/Page column 6, (2008/06/13)
The invention relates to a method for production of polyoxymethylene dialkyl ethers of formula H2m+1CmO(CH2O)nCmH2m+1, where n = 2 - 10, m independently = 1 or 2, in which a dialkyl ether selected from dimethyl ether, methyl ethyl ether or diethyl ether and trioxan are fed into a reactor and reacted in the presence of an acid catalyst, whereby the amount of water introduced into the reaction mixture with the dialkyl ether, trioxan and/or the catalyst is 1 wt. %, with relation to the reaction mixture.
Preparation and decomposition of potassium alkalide-lipophilic crown ether complexes in tetrahydrofuran
Grobelny, Zbigniew,Stolarzewicz, Andrzej,Morejko-Buz, Barbara,Bartsch, Richard A.,Yamato, Kazuhiro,Fernandez, Fernando A.,Maercker, Adalbert
, p. 7807 - 7812 (2007/10/03)
Cyclohexano-15-crown-5, cyclohexano-18-crown-6, dicyclohexano-15-crown-5, and dicyclohexano-18-crown-6, but not dicylohexano-16-crown-5, in THF dissolve potassium metal to form dark blue potassium alkalide solutions at ambient temperature. On standing, the potassium alkalide complexes decompose and the solutions turn colorless at differing rates. Identification of the products provides insight into the decomposition mechanism.
SYNTHESIS OF DIALKYL ETHERS OF POLYETHYLENE GLYCOLS
Barnakov, Ch. N.,Volgin, A. A.
, p. 152 - 155 (2007/10/02)
Methods were developed for synthesis of dimethyl and diethyl ethers of polyethylene glycols in one step (without isolation of intermediates) with the general formula R(OC2H4)mOR, where R=CH3, C2H5 and m=2-6 (degree of polyglycolicity).As starting materials monomethyl and monoethyl ethers of polyethylene glycols of the formula R(OC2H4)nOH were used, where n=1-3.As reagents toluenesulfonyl chloride and methanesulfonyl chloride were used.